msem-instigator

Vigilance
If you would take a combat phase or a main phase, take the other instead.
{U/B}, Pay 1 life: Untap target creature you control.

Flash
Flying
At the beginning of your upkeep, you may choose one that hasn't been chosen from among upkeep, draw, combat and end. After the first step of that type this turn, you get an additional step of that type.

Kahroba Pureblood has trample as long as it has a counter on it.

At the beginning of your upkeep, if Stonework Infantry is on the battlefield, each player returns all cards named Stonework Infantry from their graveyard to the battlefield.

{1}{B}: Target Knight or Soldier you control gains deathtouch until end of turn.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Flying
Dragon spells you cast have cascade.

Equipped creature gets +2/+1.
Whenever equipped creature attacks, create a 1/1 white Peasant creature token that's tapped and attacking.
Equip {2}

{T}: Add one mana of any color.
When you tap Derelict Town for mana, return it to its owner's hand.

Flying
When Reticent Possessor enters, you may attach target Aura you control to target permanent or player it could enchant.

When Contagious Ghoul dies, target creature an opponent controls gets -1/-1 until end of turn.
Foreshadow {2}{B} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Flying
Revive {1}{B}{B} ({1}{B}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Swiftstep Cliffdweller has haste as long as you control another Goblin.

Flash
When Odaya Magistrate enters, you may counter target noncreature spell.

Flying, vigilance
At the beginning of your end step, if a creature you control dealt combat damage to an opponent this turn, put a +1/+1 counter on Horizon Prophet.

Lifelink
When Slaffield Work-Hauler enters, create a 0/2 white Ox creature token for each enchantment you control.
Whenever an enchantment you control enters, Oxen you control get +1/+1 until end of turn.

Enchant creature
Enchanted creature gets +1/+1 and has hexproof.

Enchant player
When Curse of the Hunter's Moon enters, create a 2/2 green Wolf creature token.
Whenever enchanted player is attacked, the attacking player adds {R}. Until end of turn, that player doesn't lose that mana as steps and phases end.

Walker of the Final Path gets +3/+3 and has trample as long as you control a Horror.
When Walker of the Final Path enters, search your library for a Revelation card, put it into your graveyard, then shuffle.

When Mirror Paradigm enters, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
Once each turn, when a sorcery card is put into your graveyard from anywhere, you may copy it. If you do, you may cast the copy. (You still pay its costs.)

Disgraced 2 (This enters with two -1/-1 counters. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)
When Branded Contractor dies, you may put its counters on target creature.

Each opponent loses 2 life. Scry 1.
Showcase {3}{B} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

Flying
Whenever Olson's Armada attacks, if only one creature crewed it, create a 1/1 white Bird creature token with flying. Otherwise, put a +1/+1 counter on Olson's Armada.
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

Destroy target artifact or enchantment.
Scry 1.

When Elven Guard becomes the target of a spell you control, you may pay {G}. If you do, transform it.